D.C. Mun. Regs. tit. 15, § 409
409.1 The utility shall not require any tenant to make a security deposit or guarantee of payment unless the tenant's prior dealings with the utility are such that a security deposit or guarantee of payment would be required under §307 of chapter 3 of this title.
SOURCE: Final Rulemaking published at 28 DCR 3329, 3337 (July 24, 1981).